You can camp anywhere outside of the cities except for the home pasture of a farm and fields which haven’t been harvested, so you don’t need to worry if you don’t make it to your next intended stop.
There are many campsites, however, and most also have basic cabins sleeping two, four, or more people — useful for the occasional evening of lounging around and drying out.
www.camping.no is an excellent website listing all campsites in Norway.
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